I would delay or postpone the interim service no more than 6 months, a reasonable compromise I hope.
Though, I am in the middle of selling mine, so I am have one last interim service with an independent Lexus Specialist shop, which I have been using since the 4th year, as I have decided to trust my faith on the Lexus reliability.
So, this has bene my servicing history prices through the year. Hope this give someone a good reference on what they are getting/paying:
Year 1 - £285;
Year 2 - £ 485;
Year 3 - £ 335 (added the MOT);
Year 4 - £385 (went with the independant local specialist, brakes and callipers clean were included which dealer charge £185 extra)
Year 5 - £185 (dealer 5th year essential service). Only have done 3000 miles in 2020, too. Thanks Miss Rona.